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Port 5190 (aol)

IANA assigns port 5190 to aol: America-Online.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
aol TCP America-Online Marty Lyons -
aol UDP America-Online Marty Lyons -

Check what is listening on port 5190

Linux: is anything listening on TCP 5190?
sudo ss -tlnp 'sport = :5190'
Linux: UDP 5190
sudo ss -ulnp 'sport = :5190'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5190
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5190 '
Windows (Command Prompt)
netstat -ano | findstr :5190
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5190 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5190
From Windows
Test-NetConnection HOST -Port 5190
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5190

Block port 5190 in the firewall

ufw
sudo ufw deny 5190/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5190 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5190 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5190' -Direction Inbound -Protocol TCP -LocalPort 5190 -Action Block
ufw
sudo ufw deny 5190/udp
iptables
sudo iptables -A INPUT -p udp --dport 5190 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5190 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5190' -Direction Inbound -Protocol UDP -LocalPort 5190 -Action Block

Related ports

5168scte305172pcoip-mgmt5191aol-15192aol-2

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.